Grillwork



GRILLWORK NNNNNN OR April 2l, 1936` F. R. MILLER GRILLWORK Filed Aug. '3, 1934 2 SheetsffSheet 2 -PatenterigvApn 2l, l1936 y UNITE-D STATES l Frank It. Miller, Wheeling, W. Va., assilnor to The Consolidated Expanded Metal Companies,

Wheeling, ginia Application August 3,

W. Va., a corporation of West Vir- 1934, serial No. 738,239

4 Claims; (Cl. 18a-82) My invention relates, to a"metallic`screeri or grill work such as is' employed in a wide Variety of installations, for example, partitions in banks,

. offices, and the walls of elevator cages, to mention only a' few. Y

Metallic grill work as previously made has been characterized by-a high cost which has limited its utility to a considerable degree. I have invented ametallic screenor grill work which may 0 be produced at low cost and which is effective to vserve every purpose of such grill wprk as here# tofore manufactured.

In accordance with myinvention, I superpose a plurality of perforated, reticulated or forami-A nous, metal sheets, the openings in' one sheet being out of alinement with;t theothersheet or sheets., Preferably, the foraminous sheets are of flattened, expanded'metal mesh but may be formed in any other convenient way. V'I'he 1n' Vreferenceis made to the accompanying drawings illustrating a preferred embodiment of the invention and a few modiications thereof. In the 0 drawings:

Figure l illustrates 'one form of grill work in accordance with my invention; l

Figure 2 is a sectional view along the line II-II of Figure l;

work; -l-

Figurer; is' a sectional view along the line IV-'IV of Figure 3;

'Figure 5 shows a further modiiiediorm of grill work according to my invention;

lFigure 6 illustrates stilla dierent arrange vment-hand ,n

Figure 7 shows another modificationwherein 5small 'sheets are attachedat spaced intervals to the larger sheet.

. Referring now in detail to' theA drawings, Figures 'l 1 and 2 show a grill work composed offoraminous sheets III and il superposed neintle/other.:

o The -sheet I t is in the form of .a mesh having parallel strands |2- intersecting other parallel 'strands Il at an oblique angle. I'he sheet ll 'is similar. 'In Figure l, the two sheets are arranged sothat thestrands il ofthesheet Il areinline 5 withthestrands Ilofthesheet I I. Thestrands Figure3 illustrates a modiiledlfforrmof grill l2 or the sheet n intersect the strands l2 and n of the sheet l0 at oblique angles, providinga very pleasing pattern.

The sheets III and Il. are preferably secured to eah other by spot welding at intervals. 'I'he 5 points at which the welding is effected are buffed or polished after the completion of the welding. so that the surface of the completed'grill is quite uniform and is entirely unmarred by the spot welding. f

The sheets Ill. and Il are preferably composed of flattened, 4expandedmetal mesh, made accord ing to methods now known. The completed grill has an appearance simulating `that of a woven grill but its cost is a great deal less.-

Figures 3 and 4' illustrate another form ofthe invention in which sheets I4 and I5, similar to those shown at I0 and Il of Figure 1,'are assembled in a slightly different manner. In thev modification of Figures 3 and 4, the diamond- 20 shaped vopenings i6 in one of the sheets are'centered on the intersectionsof 4the strands of the other sheet. This arrangement, of course, provides a completed grill of a rather fine mesh.

Figure 5 iuustrares a. particuiany attractive 25 grill pattern produced by arranging sheets I'lv and lilwith the long diagonals of the diamonds of the two sheets at iight angles. The diamondsv are so dimensioned, furthermore, that their long ldiagonal is substantially twice their short `diago, 30 nal. It will be. apparent that the pattern of Figure 5 gives the effect of being composed of a plurality .of circles with-interleaved, rectilinear strands. i

Figure 6 isanotherexample of the numerous f attractive patterns that can be worked out by assembling-,a plurality ofl foraminous sheets with the openings therein disposed out ofalinement with each other, 'Ihe grill of Figure 6 is com- 40 posed of sheets I9 and v2li. 'Ihe openings in the two sheets are disposed at substantially 'right angles but are of different dimensions.` 'I'he ad.- vantage of this arrangement is that the border o1' a circular grill ma'y be given 4an appearance some- 45' what different from that of the .central'portion thereof. l. I Figure 'I illustrates a grill work composed of' a foraminous sheet 2|, andv a plurality of portions 22 of similar material attached thereto at regular '50 intervalain-'any desired pattern.- 'I'he pprtions Mare' preferably spot welded to the sheet 2|, the' weld being ground oir, as before 'stated. This arrangement is particularly 'desirable for grillsl oflargesises', l.

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The grill work when completed may be lacquered, painted, or otherwise coated to provide the desired finish. This further conceals -the plane o1' separation' between the sheets forming the grill.

Instead of spot welding the foraminous sheets together at wide intervals, they may be held together bya binding frame 23 of. sheet metal, as shown in Figures 3 and 6.

It will be apparent Iromthe foregoing description that the invention provides for the manufacture -of metal grill work-of a wide variety of designs, all having an attractive appearance, at a comparatively low cost. The grill work of my invention can be used in practically any'location where grill work manufactured according to previous methods is employed. The grill oi' my invention can be made of any desired strength, simply by properly dimensioning the thickness of the sheets. Almost any degree of flneness oi mesh, furthermore, can be obtained, this being .a relatively simple matter in the sheet metal exthe invention or the scope of the appended claims.

I claim:

1. A grill comprising a plurality of similar sheets of expanded metal mesh, superposed one on the other to constitute a decorative-wall panel, the openings in one sheet differing in size from those in the other.

' 2. A grill comprising a 'plurality of superposed sheets of expanded metal mesh, ,the openings of the several sheets being out of alignment with each other constituting an ornamental wall panel having a general appearance 4different from that of any sheet.

3. A grillcomprising a plurality of superposed sheets of expanded metal mesh, the'openings of the several sheets being disposed at an anale to each other, constituting an ornamental' wall panel having a patterned eiect different from that of any sheet.

4. A grill comprising a plurality of sheets of openwork material each having a plane face. superimposed with the openings in the respective sheets out of alinement with each other and with said plane faces in contact so as to constitute an ornamental grill having a general appearance different from that of any of its component sheets.

mamma. 

